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(No Model.)

R. L. ELLERY. RUNNING GEAR EOE VEHICLES.

Patented Oct. 11, 1892. l,

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UNITED vSTATES PATENT OFFICE.

ROBERT L. ELLERY, OF TAUNTON, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TOFRANCIS E. FULLER, OF'SAME PLACE.

RUNNING-GEAR FOR VEHICLES.

SPECIFICATION forming part of Letters Patent No. 484,186, dated October11, 1892.

Application filed December 26, 1.891. Serial No. 416,155. (No model.)

To all whom it may concern:

Be it known that I, ROBERT L. ELLERY, of Taunton, in the county ofBristol and State of Massachusetts, have invented a new and usefulImprovement in Vehicles,ofwhich the following is a specification,reference being had to the accompanyingdrawin gs, in which- Figure l isa side elevation of so much of a vehicle as is necessary to illustrateone form of my invention. Fig. 2 is a top plan showing the vehicle on astraight track, the king-bolts being sectioned. Fig. 3 is a similar planshowing the vehicle on a curved track. Fig. 4 is a sectional detailshowing a springsupported stud carrying a roll which runs on a track onthe car-body.

My invention is more especially intended for vehicles which run onrails, but may be embodied in vehicles intended for use on ordinaryroads; and myinvention consists, primarily, in the combination of avehicle-body with front and rear two-wheeled trucks, each pivoted by itsown king-bolt to the body at a point which causes the axle to moveendwise when the truck swings on its bolt and connected independently ofa middle truck, as by segment-gears or the like, .so that a swing ofoneptwo-wheeled truck on its king-bolt will cause a reverse swing of theother two-wheeled truck on its king-bolt-that is, when the vehicletravels about a curve the front truck not only swings on its king-bolt,but its axle also moves endwise across the body, and this motion of onetruck compels without the intervention of a middle truck alike motion ofthe other truck, but in such a direction that the axles radiate from acommon'center.

In the drawings; showing the best mode which I have contemplated ofapplying the principle of my invention, a is a part of a vehicle-body.(See Figs. 1, 2, and 3.) The outline of the body is indicated by dottedlines. The trucks b b to carry the vehicle-supports d, which are in thiscase wheels fast to axles. The trucks b b' are pivotally connected tobody a in such wise as to swing in relation t0 body @by king-bolts b2.These pivotal connections are so placed with relation to the axle or aline joining the Wheels d that when the truck swings on the king-bolt b2the axle moves endwise, as clearly shown in Fig. 3. The

trucks b b are connected together by any suitable means for compellingthem to work together, and the means preferably em ployed for thispurpose are segmental gears 19354, one connected to each truck. Wheels dare in this case mounted in boxes d', carried by the trucks b b', asusual. It will now be seen that when one set of wheels d passes from astraight path to a curved one the truck for that setswings on its boltb2, giving the wheels d a sidewise movement in relation to the car-body,as shown in Fig. 3-that is, the gear b3 on truck b swings and as itworks with the other gear bt'swings the other truck b and wheels d tosuit the curvature of the path. \Vere the trucks b b pivotally connectedto the car-body at the middle of the axle and not at one side thereof,substantially as shown the axle would not move endwise, as shown in Fig.3, and the consequence would be that the vehicle could not move in apath so sharply curved as the path which vehicles embodying my inventionwill take. In other words, vehicles embodying this main feature of myinvention will run in more sharply-curved paths than any vehiclesheretofore constructed, so far as I know.

I indicate an intermediate truck f, as that is commonly used uponstreet-railway cars; but its construction is too well known to requiredescription, and it has no necessary relation to my invention, exceptwhen the front and rear trucks b h are both made in accordance'with myinvention, and in that case this middle truck f and its wheels act tobring the trucks b b back to the position shown in Fig. 2, where thevehicle'gets in a straight track, for the flanged wheels on truck fcause the car-body to come in line with the straight track, and therebyforce is applied through the kingbolts b2 to line up the trucks b b.Were this middle truck f omitted suitable springs or the like would berequired to line up Vthe trucks b b with the straight track, asindicated in the drawings, where g g are compressionsprings, with oneabutment of each fast to the car-body, so that one or the other springis under tension whichever way the truck swings with relation to thecar-body. These springs g g are not essential when the ymiddle truck andthe segment-gears (or equivalent devices IOO for connecting the trucks bb so that they will swing together) are used; but if the middle truck beomitted these springs or their equivalents for bringing up the trucks l)l1 are necessary Whether the segment-gears be used or not. i

As shown, the body ce is provided with a curved .plate a', aiording abearing-surface for the friction-rolls b5, mounted on yielding studs Z7,carried by the trucks, the outer springs 67 of the end trucks beingconnected by braces ba.

I am aware ot' Snyders patent, No. 11,337, dated July 18, 1854, anddisclaim all that is shown in it. The main difference betweenmy'contrivance and Snyders is that Snyders front and rear trucks canswing each on its king-bolt onlywhen the middle truck is moved acrossthe body ofthe vehicle, for in Snyders oontrivance the front and reartrucks are piv.- oted to the middle truck and connected solely by themiddle truok,while in my contrivance the middle truck has nothing to doWith connecting the front and rear trucks, but it is 2. In a vehicle,front and rear two-Wheeledi trucks, each pivoted to the vehicle-body byits king-bolt at one side o'f aline joining its Wheels, a middletruckfa'st to the vehicle-body, andconmeetingmechanism,substant-iallysuch as described, between'thefrontand rear trucks and independent of the middle truck, all combinedand operating substantially as andV for the purposes specified.

ROBERT L. ELLERY.

Witnesses:

J. MAYNADIER BRoWNn, J. E. MAYNADIER.

